Alpha Pro Tech, Ltd. is a Canada-based company, which is involved in the business of protecting people, products, and environments. It is engaged in developing, manufacturing, and marketing a line of disposable protective apparel and infection control products for the cleanroom, industrial, pharmaceutical, medical, and dental markets through its wholly owned subsidiary, Alpha Pro Tech, Inc. It manufactures a line of building supply construction weatherization products. It operates through two business segments: Building Supply and Disposable Protective Apparel. The Building Supply segment consists of construction weatherization products, such as house wrap and synthetic roof underlayment as well as other woven material. The Disposable Protective Apparel segment consists of disposable protective garments, such as shoecovers, bouffant caps, coveralls, gowns, frocks and lab coats, face masks and face shields for the pharmaceutical, cleanroom, industrial, medical, and dental markets.